I feel like this is a bit of a common sense question + "in theory yes, but everyone's different" question but I wanted to double check. If someone who uses AFO braces to walk, (would have drop foot/some weakness without), would it make sense, if while they were doing a stationary activity in their own home for an hour or so, that they would remove them for comfort?
You are absolutely right. It's very much kinda like with any type of brace that whenever your home and you wanna be comfy and can afford to have them off, they come right on off. The only time I personally wore my AFO's at home was when I was getting used to them at the beggining or when I was not walking/getting used to walking again and in my wheelchair.
When getting used to AFO's you wear them in a controlled setting (at home) where you steadily increase the duration in which you wear them but you're able to take breaks. And then once you're used to them you can wear them long term.
For some people though, AFO's function as a mobility aid and the means to be able to walk so it depends on the person but more importantly what condition is causing them to need the AFO's. A lot of people with Cerebral Palsy (CP) often need AFO's and depending on the person will wear them full time or only in certain circumstances, either when just walking or some people even wear them just at night.
Any condition that causes muscle weakness or stiffness, affects muscle function, joint stability, or causes a problem when it comes to walking/walking patterns may need AFO's. Much others such as:
Charcot-Marie-Tooth disease
Drop foot in itself is a usually an indication of something else. For me I have drop foot due to my hEDS and the weekness in my ankle joints and surrounding muscles. Some people it will be just due to hyper mobility that does cause weakness or it could be something more, so that's something else to consider.
They also take a considerable amount of dexterity and strength to get on and off though. So if your character has low hand mobility or dexterity they may struggle getting them on and off and may just opt to keep them on. Or alternatively they may have an aid or someone else who can help get them on and off.
This feels a bit all over the place but I think I got all the points I wanted to and hopefully it helps. Happy writing!